Unusually it doesn't have a colophon line saying who wrote it. I can ask Khenpo Kalsang. This is titled "The Blessing Treasure: A Liturgy of the Buddha" and is English followed by transliterated Tibetan and Sanskrit.

I'm not familiar with these practices. Can someone tell me a bit about these, or if there are any others?

In the Bari Lotsawa cycle (these are practices from Atisha that Bari Lotsawa or the Abbot of Narthang collected [it is not clear to me that the Abbot and Bari Lotsawa are the same person - the cycle is called the Bari Lotsawa cycle [also the Narthang Gyatsar cycle] but my notes say that the Abbot of Narthang collected these empowerments, teachings and sadhanas]) there are two Shakyamuni Budda empowerments (the first two in fact). The second empowerment has a complex visualization but the first one is a simple visualization of Shakyamuni Buddha by himself. HE Ratna Vajra Rinpoche said something about the first empowerment being a blessing empowerment but these are not in my notes and this is just from memory.

Anyway, the sadhana that I have was given to me by Khenpo Kalsang and is the standard group sadhana for Shakyamuni Buddha that Sakya Phuntsok Ling uses and anyone can get a copy. They are very careful about protecting sadhanas from being given out inappropriately so I am certain that there will not be a problem.

Don't know for sure. But the fact that it is freely available (in Tibetan and English translation) on what looks like an official website suggests it's meant to be openly available and practiced. Also, it has a rather mahayana-like feel somehow. Guess you could always contact the marpa-gompa people to check with them if you are concerned.

There's a brief explanation of how it came to be written at the end of the text:

At dawn I dreamt that I was supplicating Lord Buddha in a strong and pleasant voice, and that morning one of my students telephoned and asked me how to perform the recitation of Lord Buddha's mantra. I considered this to be a good omen. Thus this Sadhana of the Lord Buddha was written by me, Karma Thinleypa on Dec. 17th 1986. By the blessings of the Lord Buddha, may it spread far and wide!

Edwards: You are a philosopher. Dr Johnson: I have tried too in my time to be a philosopher; but, I don't know how, cheerfulness was always breaking in.

I'm not familiar with these practices. Can someone tell me a bit about these, or if there are any others?

In the Bari Lotsawa cycle (these are practices from Atisha that Bari Lotsawa or the Abbot of Narthang collected [it is not clear to me that the Abbot and Bari Lotsawa are the same person - the cycle is called the Bari Lotsawa cycle [also the Narthang Gyatsar cycle] but my notes say that the Abbot of Narthang collected these empowerments, teachings and sadhanas]) there are two Shakyamuni Budda empowerments (the first two in fact). The second empowerment has a complex visualization but the first one is a simple visualization of Shakyamuni Buddha by himself. HE Ratna Vajra Rinpoche said something about the first empowerment being a blessing empowerment but these are not in my notes and this is just from memory.

Anyway, the sadhana that I have was given to me by Khenpo Kalsang and is the standard group sadhana for Shakyamuni Buddha that Sakya Phuntsok Ling uses and anyone can get a copy. They are very careful about protecting sadhanas from being given out inappropriately so I am certain that there will not be a problem.

Kirt

A small correction - Bari Gyatsa and Narthang Gyatsa are different cycles, and Bari Lotsa and Chim Namkha Drak (Narthang Abbot) are indeed different people, separate by about 200 years.

The former collection contains about 80 initiations from the 4 tantra sets, including one joint practice of Shakyamuni, Maitreya and Avalokitesvara. The latter contains about 35 initiations. There is also the ritual of Shakyamuni and the 16 Arhats from Atisha, which is in another part of the Drupthab Kundu, and Shakyamuni from the Four Deties of the Kadam.

I got one called "Deshek Lamten" trans. "The Path of Enlightenment" written by the Shamarpa Mipham Chokyi Lodro in 1980. I can send it to you if you want it. I also having an audio recording of the explanation of the sadhana given to me by Lama Sonam Lhundrup (a drupon for three year retreatants at Dhagpo Kundrul Ling monastery) to which I can give you the link. You don't need an empowerment for this practice, it is a sutra practice.